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Finding the Fourth Proportional to 718,707.46, 991,820.97 and 396,426.26

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Solution

The fourth proportional to 718,707.46, 991,820.97 and 396,426.26 is: 547,070.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,707.46 : 991,820.97 = 396,426.26 : x
  2. Step 2: Convert to fraction form
    718,707.46/991,820.97 = 396,426.26/x
  3. Step 3: Cross multiply
    718,707.46x = 991,820.97 × 396,426.26
  4. Step 4: Simplify right side
    718,707.46x = 393,183,877,726.67
  5. Step 5: Solve for x
    x = 393,183,877,726.67/718,707.46
  6. Step 6: Final answer
    x = 547,070.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.